| | SLO | ENG | Piškotki in zasebnost

Večja pisava | Manjša pisava

Izpis gradiva Pomoč

Naslov:PRIPRAVA IN KARAKTERIZACIJA CuNi NANODELCEV S SILIKATNO PREVLEKO
Avtorji:ID Plohl, Olivija (Avtor)
ID Ban, Irena (Mentor) Več o mentorju... Novo okno
ID Drofenik, Miha (Komentor)
Datoteke:.pdf UNI_Plohl_Olivija_2012.pdf (2,26 MB)
MD5: 9F2460A172F895C4087E7F9F84DF1B59
PID: 20.500.12556/dkum/b0e89af5-2ed5-4840-82eb-a128104bba86
 
Jezik:Slovenski jezik
Vrsta gradiva:Diplomsko delo
Tipologija:2.11 - Diplomsko delo
Organizacija:FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Opis:Namen diplomskega dela je bil sinteza magnetnih CuNi nanodelcev določenih sestav z metodo soobarjanja v reverznih micelah znotraj stabilnih mikroemulzij. Nanodelce, ki so pokazali najboljšo dispergiranost in homogenost, smo uporabili v nadaljevanju za površinsko obdelavo magnetnih delcev. Namen silikatne prevleke, s katero smo prevlekli delce, je preprečevanje aglomeracije in rasti zrn ter služi hkrati kot biokompatibilna zaščitna plast, ki omogoča uporabo magnetnih nanodelcev v medicinske namene. Z uporabo dinamičnega sipanja laserske svetlobe (DLS) smo določili velikost delcev, sintetiziranih iz vodnih faz z različno koncentracijo kovinskih prekurzorjev. Koncentracijo, pri kateri smo dobili najugodnejše rezultate, smo uporabili za nadaljnje sinteze, kjer smo spreminjali sestavo posameznih faz ali pa smo spremljali vpliv ostalih komponent. Magnetni nanodelci, ki so pokazali najboljši polidisperzni indeks ter primerno velikost delcev, so bili pozneje oblečeni s prevleko iz silike ter tudi termično modificirani. Nanodelce CuNi smo poskusili obleči tudi s srebrom, vendar smo dobili heterogeno zmes srebrovih in CuNi nanodelcev. Vzorce smo kvalitativno analizirali z rentgensko praškovno difrakcijo (XRD). S pomočjo termogravimetrične analize smo jim določili Curie-jevo temperaturo (Tc). Dispergiranost in velikost ter porazdelitev velikosti delcev smo merili z dinamičnim laserskim sipanjem svetlobe (DLS). Morfologijo vzorcev smo preučili s transmisijskim elektronskim mikroskopom (TEM). Curie-jeva temperatura sintetiziranih vzorcev je odvisna od parametrov sinteze. S spreminjanjem teh parametrov lahko vplivamo na končne velikosti delcev. Z oblačenjem teh delcev s siliko smo preprečili aglomeracijo med termično homogenizacijo in dosegli primerno Curiejevo temperaturo (Tc) za uporabo v magnetni hipertermiji.
Ključne besede:kemijsko soobarjanje, reverzne micele, magnetni nanodelci, Curiejeva temperatura, oblačenje nanodelcev
Kraj izida:Maribor
Založnik:[O. Plohl]
Leto izida:2012
PID:20.500.12556/DKUM-37339 Novo okno
UDK:54.057:[546.72:546.74](043.2)
COBISS.SI-ID:16606998 Novo okno
NUK URN:URN:SI:UM:DK:FLP9U7J7
Datum objave v DKUM:11.09.2012
Število ogledov:2417
Število prenosov:221
Metapodatki:XML DC-XML DC-RDF
Področja:KTFMB - FKKT
:
PLOHL, Olivija, 2012, PRIPRAVA IN KARAKTERIZACIJA CuNi NANODELCEV S SILIKATNO PREVLEKO [na spletu]. Diplomsko delo. Maribor : O. Plohl. [Dostopano 6 april 2025]. Pridobljeno s: https://dk.um.si/IzpisGradiva.php?lang=slv&id=37339
Kopiraj citat
  
Skupna ocena:
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.
Objavi na:Bookmark and Share


Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše podrobnosti ali sproži prenos.

Sekundarni jezik

Jezik:Angleški jezik
Naslov:PREPARATION AND CHARACTERIZATION OF CuNi NANOPARTICLES WITH SILICA COATING
Opis:The aim of the diploma work was to study the synthesis of magnetic CuNi nanoparticles with desired compositions using the co-precipitation method in reverse micelles within stable microemulsions. Nanoparticles, which exhibit the best dispersion and homogeneity, were then applied for the surface modification. The purpose of the silica coating was to prevent the agglomeration and grain coarsening and also serves as a biocompatible protecting layer for applications in medicine. By using the dynamic laser light scattering (DLS), the size of the particles synthesized particles was determined. The concentration of the aqueous phase which yields the best result was used for the further syntheses, where we followed the composition of various phases formed and/or the influence of the particular components was examined. The magnetic nanoparticles which exhibit the best polydispersion index and the appropriate size were then coated with silica, and thermally homogenised. An attempt to cover the CuNi nanoparticles with silver was made, however this action results in a heterogeneous mixture of silver and CuNi nanoparticles. A qualitative analysis of the samples was carried out using the X-ray diffraction (XRD). Thermogravimetric analysis was employed to determine Curie temperature (Tc). Dispersion, size and distribution of the particles were measured with the dynamic laser light scattering (DLS). By using the dynamic laser light scaterring (DLS), the size of the particles, synthesized from metal precursors in various aqueous phases was determined. The morphology of the samples was studied with the help of transmission electron microscope (TEM). The Curie temperature of these synthesized samples depends on the synthesis parameters. By changing these parameters, as for instance the optimizing of the homogenisation temperature, the lowering of Tc and an improving of the dispersion and particle size can be achieved. By coating these particles with silica, the agglomeration did not take place and the synthesized particles were then thermally treated to obtain more homogeneous particles with a therapeutic Curie temperature (Tc) appropriate for the use in the magnetic hyperthermia.
Ključne besede:chemical coprecipitation, reverse micelles, magnetic nanoparticles, Curie temperature, coating of nanoparticles


Komentarji

Dodaj komentar

Za komentiranje se morate prijaviti.

Komentarji (0)
0 - 0 / 0
 
Ni komentarjev!

Nazaj
Logotipi partnerjev Univerza v Mariboru Univerza v Ljubljani Univerza na Primorskem Univerza v Novi Gorici